kc3-lang/SDL/src

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• Hash : d23d9c88
  Author :
  Date : 2014-07-07T23:26:34
  

  Fixed bug 2421 - SDL_RenderCopyEx off by one when rotating by 90 and -90
  
  chasesan
  
  When using SDL_RenderCopyEx, I get a problem on some platforms where the output is offset by +/-1 on other platforms and not on others. I tried it with a center of both 0,0 (and offsetting by width/height) and NULL (for centered).
  
  The rotation involved is 90, and/or -90 rotation. The rotation was a constant, no arithmetic was involved when inputting it into SDL_RenderCopyEx.
  
  This occurred with 32x32, 24x24, and 16x16 texture sizes. I apologize that I don't have more precise information, as I received the information as a bug report myself. But I have tracked the problem down to here.
  
  My program requires pixel perfect alignment on several different platforms, so this is something of a showstopper for me.
  
  --
  
  Sylvain
  
  It appears the RenderCopyEx is done as expected,
  this is the red rectangle which is not correctly positionned !
  
  So, here's patch with a 0.5 float increment, like for opengles2, for DrawLines, and also Draw Points.
  

• Files

• SDL.c
• SDL_assert.c
• SDL_assert_c.h
• SDL_error.c
• SDL_error_c.h
• SDL_hints.c
• SDL_internal.h
• SDL_log.c
• atomic/
• audio/
• core/
• cpuinfo/
• dynapi/
• events/
• file/
• filesystem/
• haptic/
• joystick/
• libm/
• loadso/
• main/
• power/
• render/
• stdlib/
• test/
• thread/
• timer/
• video/

• Properties

• Git HTTP	https://git.kmx.io/kc3-lang/SDL.git
  Git SSH	git@git.kmx.io:kc3-lang/SDL.git
  Public access ?	public
  Description	Fork of https://github.com/libsdl-org/SDL
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